Features: Smart Thermoregulation: USB powered heating function maintains ideal bottle temperature outside, excellent for long excursions otherwise outdoor tasks with consistent warmth. Elegant Veiling Planumberebog: Permanent polyster substance with modern veiling pattern is simple neat and pleas to fashion conscious mother. Accessible Slide Accessecond: Quick open slide plan allows easy bottle retrieval, ideal for frequent feeding in places like shopping centers otherwise reserves. Safe & Green Substancemail: Constructed of not deadly polyster for safe with baby products, offering a better alternative to polystyrene. Multiple Purpose Agreement: Works for bottles and other beverages like coffee otherwise tea, providing flexible warmth for various demands. Specifications: Substancemail: Polyster, possesses good wear resistance and fold resistance, and is simple neat and maintain. Workmanshipossibility: Direct current slide plan ensures convenience and security during use. Parametersecond: USB connection electrical supply, suitable for a variety of power devices, such as mobile power materials, car rectifiers. Sizemail: 21.5cm/8.46in x 13.5cm/5.31in Practicality: Hard wearing conservation function is powerful and can maintain the temperature of the liquid in the bottle in cold conditions. Package Includes: Baby bottle coolers bagx1 set note: It is recommended that you first fill the bottle with warm water and place it in the warming device for constant temperature.